tuleap #850 reply dialog with no extra button to add for the alignment.

Change-Id: Id02325626654f7e8a329f821cecaaf57552bb238
Signed-off-by: Jacques Bouthillier <lmcbout@gmail.com>
diff --git a/org.eclipse.egerrit.ui/src/org/eclipse/egerrit/internal/ui/editors/ReplyDialog.java b/org.eclipse.egerrit.ui/src/org/eclipse/egerrit/internal/ui/editors/ReplyDialog.java
index b5dbe6b..0eaa213 100644
--- a/org.eclipse.egerrit.ui/src/org/eclipse/egerrit/internal/ui/editors/ReplyDialog.java
+++ b/org.eclipse.egerrit.ui/src/org/eclipse/egerrit/internal/ui/editors/ReplyDialog.java
@@ -623,10 +623,12 @@
 	 * @param radioComposite
 	 */
 	private void createFillerRadioButtons(int num, Composite radioComposite) {
-		Button[] emptyRadios = new Button[num];
-		for (int i = 0; i < num; i++) {
-			emptyRadios[i] = new Button(radioComposite, SWT.RADIO);
-			emptyRadios[i].setVisible(false);
+		if (num > 0) {
+			Button[] emptyRadios = new Button[num];
+			for (int i = 0; i < num; i++) {
+				emptyRadios[i] = new Button(radioComposite, SWT.RADIO);
+				emptyRadios[i].setVisible(false);
+			}
 		}
 	}